Wire-forming machine.



No. 728,201. I PATENTED MAY. 19, 1 903. x

A. O. CAMPBELL.

WIRE FORMING MACHINE.

APPLICATION TILED AUG. 28. 1902.

6 SHEETS-SHEET 1..

Nb MODEL.

.No. '728,20l v I PATBNTED'MAY 19, 1903.

4 A. 0. CAMPBELL. WIRE FORMING MACHINE.

APPLIGATION FILED AUG. 28. 1902.

NO MODEL. I 6 SHEETS-SHEET wve 727 07" No. 728,201. PATENTED MAY19,1903;

A. G. CAMPBELL. WIRE FORMING MACHINE.

APPLICATION FILED AUG. 28. 1902. no MODEL.

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No. 728,201. PATENTED MAY 19, 1903;. A. c. CAMPBELL. WIRE FORMINGMACHINE.

APPLICATION FILED AUG. 28. 1902.

UNITED STATES Patented May 19, 1903.

PATENT OFFICE.

ANDREW C. CAMPBELL, OF l/VATERBURY, CONNECTICUT, ASSIGNOR OF ONE- HALFTO CHARLES W. WARNER, OF MIDDLETOWN, CONNECTICUT.

WIRE-FORMING MACHI 'N E.

SPECIFICATION forming part of Letters Patent No. 728,201, dated May 19,1903.

I Application filed August 28, 1902 Serial No. 121,329. (No model.)

To all whom it may concern:

Be it known that 1, ANDREW C. CAMPBELL, a citizen of the United States,residing at Waterbury, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inWire-FormingMachines,of which the following is a specification.

The invention relates to a wire-forming machine which is particularlydesigned for forming tongues for wire buckles.

The object is to provide a compact, powerful, and rapid machine whichcuts a length of wire from a coil or rod and forms a curved point at oneend'and a partially-rounded loop that is flattened on theinside at theother end.

The machine that is shown in the accompanyingdrawings as embodyingtheinvention feeds a length of wire longitudinally into p0 sition to becut and partly shaped by a pair of blanking-dies that act transverselyof the wire and then moves the wire sidewise into the position in whichthe loop end is'curved by a die that reciprocates longitudinally of thewire.

Figure 1 shows a plan of this machine'with the wire fed into position tobe-acted upon by the blanking-dies. Fig. 2 shows a longitu- Fig. 6 showsthe blanking-dies closedupon a piece of wire which they have severedfrom the stock. Fig. 7 shows the same parts with the blanked piececarried outinto position to be acted upon by the bending-dies. Fig. 8shows the bending dies acting upon the blank, and Fig. 9 is aperspective view of a completed buckle-tongue'formed on this machine.

The rectangular frame 1 of the machine is supported by any common formof legs 2. In suitable bearings near the back of the frame is the shaft3, that is provided with a drivingpulley 4 and a crank 5. Supported byguides pivoted to the front of the frame.

6, attached to the sides of the frame, is a slide 7. A* link 8 connectsthis slide with the crank on the driving-shaft. A die-holder 9 isfastened to the front of the slide by a block 10, that is bolted to theslide. Secured in a socket in the front end of the die-holder is ablanking-die 11, that has a shearing edge 12 on one side and a face thatis adapted to flatten and slightly curve each end of the sheared blank.This die is perforated, and a pin 13 extends through the perforationfrom a socket in the shank of the die-holder. A spring 1 L is placed inthis socket, so as to normally thrust the pin forward out of the frontend of the die. A die-bed 15 is secured to the front end of the frame bybolts 16. In a socket in the back face of this die-bed is a female die17, with a face that complements the face of the male die. This femaledie'is located directly opposite the movable male die, and it isadjusted vertically by set-screws 18 and horizontally by set-screws 19,that pass through the diebed and butt against the sides of thedie. Thefemale die and the diebed are perforated for a rod 20. This rod isadjustably fastened by a screw 25 to a sleeve 21, that is movable in anopening in the front of the frame and is attached to a block 22, that isconnected by a stud 23 with a lever 24, On the end of the driving-shaftopposite the pulley is a bevel-gear 26, that meshes with a bevelgear 27on the endof a shaft 28, that is'supported by brackets 29, which projectfrom the side of the frame of the machine. The end of this shaftopposite the bevel gear bears a cam-block 57, havinga cam-groove 58 inits periphery. A roller onthe end of the lever 24 lies in thiscam-groove, so that the rotation of the shaft oscillates the lever andreciprocates the rod in and out of the female die. On the shaft 28 is acam-block with a cam-groove 30 in its face. A roller 31 on yoke 32 liesin this cam-groove. Extending through an opening in the side of theframe is a punch-carrier 33, the shank 34 of which is inserted into arecess in the lower part of the yoke 32 and after being adjustedlongitudinally by the screw 35 is clamped by the screw 36. The shank 37of the punch 38 is clamped by a set-screw 39 in a socket in ICU .. whichengages the teeth of the ratchet-wheel 49. The rotation of the crankgives the ratchetwheel an intermittent movement. Fastened to theratchet-wheel is a gear 50, in mesh with which is a gear 51. The shaftsof these gears are supported by brackets 53, that project from the sideof the frame. These shafts bear grooved feed-rolls 54.

When the machine is set in operation, the wire 55 is advancedintermittently by the feed-rolls through the guide-tube 56, that is heldby the side of the frame of the machine. Each intermittent movement ofthe rolls feeds a sufficient length of wire for forming a tongue infront of the female blanking-die, as shown in Fig. 5. After the wire hasbeen fed the male die moves forward and shears 01f a piece of wire andthen forces it into the female die, as illustrated in Fig. 6. Thisaction of the blanking-die sharpens, flattens, and curves the end whichis to form the point of the tongue and flattens out and partially curvesthe end which is to form the eye of the tongue. After this operation asthe male die is moved backward the rod thatpasses through the female dieis moved backward, so that the partially-formed tongueblank is grippedat the center between the rod and the springpin that projects from themale die. These move backwardly together and carry the blank into linewith the bendingdies, as shown in Fig. 7. After the bending-dies havegrasped the blank the rod is withdrawn and the spring-pin moved backwith the male die. The punch is then moved so that the blank iscompressed longitudinally between it and the punch-bed and the pointedend bent a little more than the eye and curved considerably more, asillustrated in Fig. 8. When the blank has been acted upon by thebending-dies and formed to final shape, as illustrated in Fig. 9, thepunch is withdrawn and the tongue allowed to drop from the machine.These operations are carried on very rapidly, each revolution of themain shaft feeding a section of wire, cutting off and bending the fedsection by the transversely-acting male and female blanking-dies,bending to final form, and allowing it to drop from the machine.

I claim as my invention- 1. A machine for forming wire having a shearingand blanking die movable transversely of the wire, carrying mechanismfor transferring the partially-formed blank from the blanking-dies intoline with bending-dies, and a bending-die movable longitudinally of thewire, substantially as specified.

2. A machine for forming wire having feeding mechanism forintermittently advancing the wire, shearing and blanking dies adapted toact transversely of the wire, mechanism for separating the blanking-diesand the blanked wire, and bending-dies adapted to act longitudinally ofthe Wire, substantially as specified.

3. Amachine for forming wire having feeding mechanism for intermittentlyadvancing the wire, a shearing and blanking die movable transversely ofthe Wire, carrying mechanism for transferring the partially-formed blankfrom the blanking-dies into line with bending-dies and a bending-diemovable longitudinally of the wire, substantially as specified.

4. A machine'for forming wire, having a feed for intermittentlyadvancing the wire, a fixed female die and a movable male die foroperating transversely upon the wire, a rod extending through the femaledie and a pin extending through the male die, mechanism for causing therod and pin to grasp the blank after the action of the blanking-dies andtransfer it into line with bending-dies, and a movable bending-die foracting longitudinally upon the wire, substantially as specified.

5. A machine for forming wire having a feed for intermittently advancingthe wire, male and female blanking-dies adapted to operate transverselyupon the wire, bendingdies adapted to operate longitudinally upon thewire, and mechanism for transferring the blanked wire transversely fromthe blankingdies into line with the bending-dies, substantially asspecified.

ANDREW C. CAMPBELL.

Witnesses:

L. BARRETT CAMPBELL, N. W. CUMMINS.

ICO

